scholarly journals Vortex Asymmetry and Breakdown over a Slender Delta Wing—A Limit Cycle Flow Phenomenon

1988 ◽  
Vol 31 (9) ◽  
pp. 2391-2391
Author(s):  
A. Ayoub ◽  
B. G. McLachlan
Keyword(s):  
Limit Cycle ◽  
Delta Wing ◽  
Flow Phenomenon

Modeling Delta Wing Limit-Cycle Oscillations Using a High-Fidelity Structural Model

2005 ◽  
Vol 42 (5) ◽  
pp. 1209-1217 ◽  
Author(s):  
Peter J. Attar ◽  
Earl H. Dowell ◽  
John R. White
Keyword(s):  
Limit Cycle ◽  
Structural Model ◽  
Delta Wing ◽  
High Fidelity ◽  
Limit Cycle Oscillations

Experimental and Computational Aeroelastic Analysis of a Composite Material Delta Wing in Low Subsonic Flow

2011 ◽  
Author(s):  
Kedar Sapkal ◽  
Peter J. Attar
Keyword(s):  
Composite Material ◽  
Limit Cycle ◽  
Structural Dynamics ◽  
Strain Energy ◽  
Delta Wing ◽  
Computational Study ◽  
Fiber Composite ◽  
Computational Time ◽  
Carbon Fiber Composite ◽  
Dimensional Parameter

An experimental and computational study of the flutter and limit cycle oscillations (LCOs) of a three layer, carbon fiber composite material 45° delta wing is presented. The computational aeroelastic model utilizes a set of nonlinear structural dynamics (modal) equations which are coupled to a vortex lattice aerodynamic model. The nonlinear modal equations for the structure are formulated using a system identification methodology. To reduce the computational time needed in the computation of the strain energy needed to construct the reduced order structural dynamics model, a new algorithm which uses a Smolyak sparse grid technique is proposed to perform the sampling of strain energy data used for generation of the equations of motion. Experiments and computations are performed, and compared, for a number of layup configuration angles. The qualitative agreement between experimental flutter and limit cycle results is good with both sets of results displaying similar trends with respect to variations in layup angle and a non-dimensional parameter which gives a measure of the bending-torsion coupling in the laminate.

Delta Wing with Store Limit-Cycle-Oscillation Modeling Using a High-Fidelity Structural Model

2008 ◽  
Vol 45 (3) ◽  
pp. 1054-1061 ◽  
Author(s):  
Peter J. Attar ◽  
Earl H. Dowell ◽  
Deman Tang
Keyword(s):  
Limit Cycle ◽  
Structural Model ◽  
Delta Wing ◽  
Limit Cycle Oscillation ◽  
High Fidelity ◽  
Cycle Oscillation

Limit cycle oscillations of delta wing models in low subsonic flow

AIAA Journal ◽  
1999 ◽  
Vol 37 ◽  
pp. 1355-1362
Author(s):  
Deman Tang ◽  
James K. Henry ◽  
Earl H. Dowell
Keyword(s):  
Limit Cycle ◽  
Subsonic Flow ◽  
Delta Wing ◽  
Limit Cycle Oscillations

Limit Cycle Oscillations of Delta Wing Models in Low Subsonic Flow

AIAA Journal ◽  
10.2514/2.627 ◽  
1999 ◽  
Vol 37 (11) ◽  
pp. 1355-1362 ◽  
Author(s):  
Deman Tang ◽  
James K. Henry ◽  
Earl H. Dowell
Keyword(s):  
Limit Cycle ◽  
Subsonic Flow ◽  
Delta Wing ◽  
Limit Cycle Oscillations
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